Benzinga's Top Pre-Market Losers

Prosensa Holding NV (NASDAQ: RNA) dipped 74.54% to $6.11 in the pre-market session on failed duchenne muscular dystrophy study.

AK Steel Holding (NYSE: AKS) shares fell 10.59% to $3.97 in the pre-market trading after the company projected wider loss for the third quarter.

Sarepta Therapeutics (NASDAQ: SRPT) shares dropped 8.69% to $33.50 in pre-market trading on GlaxoSmithKline (NYSE: GSK) trial miss.

Darden Restaurants (NYSE: DRI) dipped 5.48% to $46.60 in the pre-market session after the company reported downbeat Q1 results and announced the retirement of its COO.

Posted-In: Top Pre-Market LosersNews Movers & Shakers Pre-Market Outlook Markets

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